Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 41: Topological Semimetals
TT 41.8: Vortrag
Mittwoch, 11. März 2026, 11:30–11:45, HSZ/0103
Topological Dirac Semimetal Carbon Nanoscroll — •Tzu-Ching Hsu1, Jhih-Shih You1, Hsiu-Chuan Hsu2, and Ion Cosma Fulga3 — 1Department of Physics, National Taiwan Normal University, Taipei, Taiwan, — 2Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan — 3Institute for Theoretical Solid State Physics, IFW Dresden, Dresden, Germany
Carbon nanoscrolls (CNS), rolled-up structures formed from single-layer graphene, have recently attracted significant attention owing to their distinctive geometry. In this work, we theoretically investigate the topological properties of a series of CNS under different axial magnetic fields and various edge alignment conditions, within the large-radius approximation. As a function of magnetic field strength and the number of turns in the scroll, these systems host topologically protected Dirac cones, which survive even when chiral symmetry is broken. Furthermore, the number of Dirac cones, their real-space probability density, and the magnetic flux at which they occur can be controlled deterministically, being dictated by the system's symmetries. Our results establish a foundation for further studies of the fundamental physics and potential applications of CNS and other two-dimensional materials with similar geometries.
Keywords: Carbon nanoscrolls; Dirac cone